Why do rays run radially in a woody stem In a longitudinal s

-Why do rays run radially in a woody stem?

-In a longitudinal section through a stem, would it be possible for you to distinguish between the protoxylem and metaxylem? If so, how?

-What is a \"bordered pit\"? Which group of plants has an abundance of these?

Solution

Answer:

The internal structure of stem consist of three tissue systems i.e.